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21
Cardiff Bus

21 bus timetable – Rhiwbina: Cardiff Bus Interchange to Cardiff Bus Interchange

Cardiff Bus Interchange - Cardiff Bus Interchange

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Not the 21 you're looking for? 87 other bus routes in Great Britain use this number.

Greyfriars Road → Greyfriars Road

106 trips · first 06:40 · last 21:38
Thu Live Valid 2026-06-07 – 2027-05-12

Swipe sideways to see later trips.

Stop
06:40 Greyfriars Road
06:40 Greyfriars Road
06:40 Greyfriars Road
06:40 Greyfriars Road
07:00 Greyfriars Road
07:00 Greyfriars Road
07:00 Greyfriars Road
07:00 Greyfriars Road
07:27 Greyfriars Road
07:27 Greyfriars Road
07:27 Greyfriars Road
07:27 Greyfriars Road
08:10 Greyfriars Road
08:10 Greyfriars Road
08:10 Greyfriars Road
08:10 Greyfriars Road
08:45 Greyfriars Road
08:45 Greyfriars Road
08:45 Greyfriars Road
08:45 Greyfriars Road
09:15 Greyfriars Road
09:15 Greyfriars Road
09:15 Greyfriars Road
09:15 Greyfriars Road
09:45 Greyfriars Road
09:45 Greyfriars Road
09:45 Greyfriars Road
09:45 Greyfriars Road
10:15 Greyfriars Road
10:15 Greyfriars Road
10:15 Greyfriars Road
10:15 Greyfriars Road
10:45 Greyfriars Road
10:45 Greyfriars Road
10:45 Greyfriars Road
10:45 Greyfriars Road
11:15 Greyfriars Road
11:15 Greyfriars Road
11:15 Greyfriars Road
11:15 Greyfriars Road
11:45 Greyfriars Road
11:45 Greyfriars Road
11:45 Greyfriars Road
11:45 Greyfriars Road
12:15 Greyfriars Road
12:15 Greyfriars Road
12:15 Greyfriars Road
12:15 Greyfriars Road
12:45 Greyfriars Road
12:45 Greyfriars Road
12:45 Greyfriars Road
12:45 Greyfriars Road
13:15 Greyfriars Road
13:15 Greyfriars Road
13:15 Greyfriars Road
13:15 Greyfriars Road
13:45 Greyfriars Road
13:45 Greyfriars Road
13:45 Greyfriars Road
13:45 Greyfriars Road
14:15 Greyfriars Road
14:15 Greyfriars Road
14:15 Greyfriars Road
14:15 Greyfriars Road
14:45 Greyfriars Road
14:45 Greyfriars Road
14:45 Greyfriars Road
14:45 Greyfriars Road
15:15 Greyfriars Road
15:15 Greyfriars Road
15:15 Greyfriars Road
15:15 Greyfriars Road
15:50 Greyfriars Road
15:50 Greyfriars Road
15:50 Greyfriars Road
15:50 Greyfriars Road
16:20 Greyfriars Road
16:20 Greyfriars Road
16:20 Greyfriars Road
16:20 Greyfriars Road
16:50 Greyfriars Road
16:50 Greyfriars Road
16:50 Greyfriars Road
16:50 Greyfriars Road
17:25 Greyfriars Road
17:25 Greyfriars Road
17:25 Greyfriars Road
17:25 Greyfriars Road
17:55 Greyfriars Road
17:55 Greyfriars Road
17:55 Greyfriars Road
17:55 Greyfriars Road
18:40 Greyfriars Road
18:40 Greyfriars Road
18:40 Greyfriars Road
18:40 Greyfriars Road
19:35 Greyfriars Road
19:35 Greyfriars Road
19:35 Greyfriars Road
19:35 Greyfriars Road
20:35 Greyfriars Road
20:35 Greyfriars Road
20:35 Greyfriars Road
21:38 Greyfriars Road
21:38 Greyfriars Road
21:38 Greyfriars Road
Cardiff Bus Station, Cardiff Bus Interchange Bay 4
07:24
07:24
07:24
07:24
07:00
07:00
07:00
07:00
07:27
07:27
07:27
07:27
08:10
08:10
08:10
08:10
08:45
08:45
08:45
08:45
09:15
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09:15
09:45
09:45
09:45
09:45
10:15
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10:15
10:15
10:45
10:45
10:45
10:45
11:15
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11:15
11:45
11:45
11:45
11:45
12:15
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12:15
12:15
12:45
12:45
12:45
12:45
13:15
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13:45
13:45
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14:15
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14:45
15:15
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15:50
15:50
15:50
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16:20
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16:50
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17:25
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17:55
17:55
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18:40
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18:40
18:40
19:35
19:35
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20:35
20:35
20:35
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Birchgrove Stop 1 outside Principality
06:40
06:40
06:40
06:40
07:13
07:13
07:13
07:13
07:43
07:43
07:43
07:43
08:28
08:28
08:28
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09:00
09:00
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09:30
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09:30
10:00
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10:30
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11:00
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11:00
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11:30
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11:30
12:00
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12:30
12:30
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12:30
13:00
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13:30
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14:00
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14:34
14:34
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14:34
15:04
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15:04
15:04
15:34
15:34
15:34
15:34
16:09
16:09
16:09
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16:39
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17:09
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17:44
17:44
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18:14
18:14
18:14
18:14
18:58
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18:58
19:52
19:52
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20:50
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21:50
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21:50
Rhiwbina Station before
06:44
06:44
06:44
06:44
07:18
07:18
07:18
07:18
07:49
07:49
07:49
07:49
08:34
08:34
08:34
08:34
09:07
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09:37
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09:37
10:07
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10:37
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10:37
10:37
11:07
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11:07
11:37
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11:37
11:37
12:07
12:07
12:07
12:07
12:37
12:37
12:37
12:37
13:07
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13:37
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13:37
14:07
14:07
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14:07
14:40
14:40
14:40
14:40
15:10
15:10
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15:10
15:40
15:40
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15:40
16:15
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16:45
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16:45
16:45
17:15
17:15
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17:15
17:50
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17:50
18:20
18:20
18:20
18:20
19:03
19:03
19:03
19:03
19:57
19:57
19:57
19:57
20:54
20:54
20:54
21:54
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21:54
Whitchurch, Three Elms opposite
07:06
07:06
07:06
07:06
07:44
07:44
07:44
07:44
08:23
08:23
08:23
08:23
09:04
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09:04
09:32
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10:02
10:02
10:02
10:02
10:32
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10:32
10:32
11:02
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11:02
11:32
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11:32
11:32
12:02
12:02
12:02
12:02
12:32
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12:32
12:32
13:02
13:02
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13:02
13:32
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14:02
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14:02
14:02
14:32
14:32
14:32
14:32
15:05
15:05
15:05
15:05
15:36
15:36
15:36
15:36
16:06
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16:06
16:41
16:41
16:41
16:41
17:11
17:11
17:11
17:11
17:41
17:41
17:41
17:41
18:16
18:16
18:16
18:16
18:46
18:46
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18:46
19:25
19:25
19:25
19:25
20:18
20:18
20:18
20:18
21:13
21:13
21:13
22:13
22:13
22:13
Maindy, Cathays High School outside
07:14
07:14
07:14
07:14
07:53
07:53
07:53
07:53
08:35
08:35
08:35
08:35
09:12
09:12
09:12
09:12
09:40
09:40
09:40
09:40
10:10
10:10
10:10
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10:40
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10:40
10:40
11:10
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11:40
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11:40
11:40
12:10
12:10
12:10
12:10
12:40
12:40
12:40
12:40
13:10
13:10
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13:10
13:40
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13:40
13:40
14:10
14:10
14:10
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14:40
15:12
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15:45
15:45
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15:45
16:15
16:15
16:15
16:15
16:50
16:50
16:50
16:50
17:20
17:20
17:20
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17:50
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18:25
18:25
18:25
18:25
18:55
18:55
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18:55
19:33
19:33
19:33
19:33
20:26
20:26
20:26
20:26
21:20
21:20
21:20
22:20
22:20
22:20
Cardiff, Greyfriars Road GL outside
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22:30
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Cardiff, Greyfriars Road GL outside
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21:30
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21:38
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21:38
Cardiff Bus Station, Cardiff Bus Interchange Bay 4
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08:03
08:03
08:03
08:03
08:50
08:50
08:50
08:50
09:27
09:27
09:27
09:27
09:55
09:55
09:55
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10:25
10:25
10:25
10:25
10:55
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11:25
11:25
11:25
11:25
11:55
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11:55
11:55
12:25
12:25
12:25
12:25
12:55
12:55
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13:25
13:25
13:25
13:25
13:55
13:55
13:55
13:55
14:25
14:25
14:25
14:25
14:55
14:55
14:55
14:55
15:27
15:27
15:27
15:27
16:00
16:00
16:00
16:00
16:30
16:30
16:30
16:30
17:05
17:05
17:05
17:05
17:35
17:35
17:35
17:35
18:05
18:05
18:05
18:05
18:40
18:40
18:40
18:40
19:10
19:10
19:10
19:10
19:48
19:48
19:48
19:48
20:36
20:36
20:36
20:36
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Timetable data from Cardiff Bus, refreshed 2026-07-01 · Source: Traveline National Dataset (TNDS) · Service code S_21.

Main stops shown

8 main stops

The map can include more stops across directions; use All Stops above for the full timetable list.

  1. Cardiff Bus Station, Cardiff Bus Interchange Bay 4
  2. Birchgrove Stop 1 outside Principality
  3. Rhiwbina Station before
  4. Whitchurch, Three Elms opposite
  5. Maindy, Cathays High School outside
  6. Cardiff, Greyfriars Road GL outside
  7. Cardiff, Greyfriars Road GL outside
  8. Cardiff Bus Station, Cardiff Bus Interchange Bay 4

Looking for a different 21 bus?

87 other routes

The number 21 is used by 87 other bus routes around Great Britain, run by different operators in different areas.

21
Goldstone Valley Shops ↔ Brighton Marina
Brighton · Brighton & Hove Bus and Coach Company
 21
Southend, Travel Centre ↔ Canvey, Newlands, Creek Road
Leigh-on-Sea · First Essex
 21
Southend ↔ Canvey (Newlands, Creek Road )
South Benfleet · First Essex
 21
Barne Barton - Plympton via Devonport, City Centre, Chaddlewood
Plympton · Plymouth Citybus
 21
Worksop - Doncaster
Worksop · Stagecoach East Midlands
 21
Swadlincote ↔ Burton
Swadlincote · Midland Classic
 21
Taunton ↔ Burnham on Sea
Bridgwater · First Devon and Cornwall
 21
Richard Huish College ↔ Rooks Bridge, Garage
Bridgwater · First Devon and Cornwall

See all 88 bus routes numbered 21